Bridge.



W. E. MO0RE.

BRIDGE.

APPLICATION FILED DEC. 4, 1907.

1,096,183, 1 Patented May 12, 1914.

COLUMBIA PLANDGRAPH co., WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

WILLIAM E. MOORE, OF PITTSBURGH, PENNSYLVANIA.

BRIDGE.

To all whom, it may concern Be it known that I, IVILLIAM E. MOORE, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Bridges, of which the following is a specification.

This invention relates more particularly to girder bridges of reinforced concrete or the like especially adapted for railways; the said invention being characterized by a construction wherein the concrete or the like is carried up above the deck level of the bridge and along the sides thereof in such manner as to fulfil the twofold function of increasing the effective depth of the girder and providing side guards along the deck of the bridge.

The said invent-ion further relates to the manner of reinforcing a structure of the above character, and to the mounting of railway tracks and guard rails thereon.

In order to more fully describe my said invention reference will be had to the accompanying drawings, wherein Figure 1, is a vertical cross section of a form of reinforced concrete girder railway bridge embodying my invention, the section being taken on line 1-1, Fig. 2; Fig. 2, a fragmentary top plan view of the said bridge, and, Fig. 3, a fragmentary detail sectional view showing a different way of mounting the track rails from that shown in Fig. 1.

In the accompanying drawings, 1 represents the bridge deck; 2, 3, the side guards, and 4, 5, supporting beams for said parts, all forming one integral structure of concrete or the like, suitably reinforced.

The deck of the bridge and the side guards are reinforced by means of a series of metal rods 6 embedded in the deck portion 1, and extending transversely thereacross to the guard portions 2, 3, where they bend upward at their ends, as at 7, 8, and extend a suit able distance into said guard portions. I may provide, in addition to these transverse rods, a series of auxiliary reinforcing rods 9, extending longitudinally of the bridge in the guard portions, and rods 10 extending in they same direction in the deck, though these auxiliary reinforcements are not necessary in all cases.

The beams 7, 8, may be reinforced by a series of metal rods 11 at their upper ends extending longitudinally of the bridge, and by a series of metal rods 12 extending in the Specification of Letters Patent.

Application filed December 4, 1907.

Patented May 12, 1914. Serial No. 404,981.

same direction at the lower ends of the beams. In addition to these longitudinal rods, I may provide metal stirrups 13, vertically embedded in said beams. I do not, however, confine my invention to this or my other specific arrangement of the beam reinforcement.

In Fig. 1, of the drawings I have shown a railway bridge wherein the track rails 14, 14, are embedded directly in the concrete of the bridge deck. These rails, however, may be embedded in cement 15 which is carried in grooves 16 formed in the bridge deck and extending longitudinally thereof.

In the case shown, the track rails lie in the angle of a step between the deck level and the side guards 2 and 3. This permits ample clearance on the inner side of the track rails for the wheel flanges in using rails of the type shown.

In order to protect the inner edges of the side guard portions 2, 3, and further strengthen the same, metal guard rails 17, 18, may be embedded in the said portions.

The molding of the concrete and the supporting of the reinforcing rods during the molding process may be effected in any de sired manner.

By extending the reinforced concrete up above the deck level to form the side guards 2, 3, it will be seen that greater strength for a given depth of girder below the deck level is obtained. An important advantage of this is that for a given height of track or deck level an increased clearance beneath the girder is obtained, which is especially desirable where the girder crosses a railway or street.

Having thus described my invention what I claim is:

1. A bridge, comprising a concrete girder having a web forming the deck of the bridge, integral side guards extending above the deck level, a step between the deck level of the bridge and the top of the side guards, and a track rail embedded in said bridge on each side of its deck and extending longitudinally thereof, the tread of each of said rails lying in the angle formed by the longitudinal inner top edge or corner of said step.

2. A bridge, comprising a concrete girder having a web forming the deck of the bridge, integral side guards extending above the deck level, a step between the deck level of the bridge and the top of the side guards,

a guard rail embedded in each of said side I longitudinal inner top edge or corner of said. guards and having an exposed surface coinstep. 10 cident with the angular inner top edge or In testimony whereof I afiix my signature longitudinal corner of each of said side in presence of two Witnesses.

guards, and a track rail embedded in said I WILLIAM E. MOORE. bridge on each side of its deck and extending Vitnesses:

longitudinally thereof, the tread of each of ROBERT T. VATT,

said rails lying in the angle formed by the Ron'r. F. VVENDE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents, Washington, D. C. 

